Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a0b1f30e67a54b2…

MALICIOUS

PDF

44.1 KB Created: 2020-08-18 17:52:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 798fbeb71df2e39806d47e0a9b7532e6 SHA-1: 2eed8f58126b9777bba565eaba6bdb07b09b436a SHA-256: 3a0b1f30e67a54b26555e6933e81757d59e92859f0dde83410d15577d9f5392f
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL, 'https://ttraff.com/pify?keyword=reasonable+accommodation+form+apartment', is designed to lure users with a plausible-sounding form title. The file also exhibits characteristics of a link farm, with numerous links pointing to external resources, many hosted on Shopify. The document body, though heavily obfuscated, contains references to the malicious URL and other embedded links.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=reasonable+accommodation+form+apartment
    • http://files.briarwoodsrowing.org/uploads/1/3/0/8/130874620/4da9c7d5f4ec.pdf
    • https://cdn.shopify.com/s/files/1/0433/3712/1951/files/arduino_sensor_code.pdf
    • https://cdn.shopify.com/s/files/1/0434/2503/8497/files/muzukowiwep.pdf
    • https://cdn.shopify.com/s/files/1/0440/4091/3061/files/product_flyer_design_template.pdf
    • https://cdn.shopify.com/s/files/1/0437/8761/6413/files/agricultural_marketing_course.pdf
    • https://cdn.shopify.com/s/files/1/0429/4826/4089/files/regodewasoj.pdf
    • https://cdn.shopify.com/s/files/1/0435/4893/4295/files/72422742271.pdf
    • https://cdn.shopify.com/s/files/1/0452/2446/0445/files/pigajib.pdf
    • https://cdn.shopify.com/s/files/1/0434/1468/3813/files/technical_drawing_lecture_notes.pdf
    • https://cdn.shopify.com/s/files/1/0433/7414/9793/files/music_and_lyrics_imdb_parents_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/7790/1214/files/civic_education_textbook_zambia.pdf
    • https://cdn.shopify.com/s/files/1/0438/0898/1153/files/17077706664.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006eff.bin
f2380bce93edb8467e250060994a6ee2c39a267a459a62562f67f94195d7b9ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EFF 5448 bytes
font_01_sfnt_off0000816e.bin
ff56ae3abc515517d76e741eaa59e6c19e2f48d702dd943080b114ebede75694		 pdf-font-stream PDF embedded font (sfnt) at offset 0x816E 9952 bytes

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